Autor:	Ullman, Daniel, Konecny, Vaclav, Binz, Jany C., Klamkin, M. S., Liu, A., Sastry, K. R. S., Bloom, David M., Callan, David, Gardner, C. S., Meyers, Leroy F., Bailey, Donald F., Wong, Yan-loi, Brunson, Barry, Graves, David, Lord, N. J., Kwong, Y. H., Hickman, James C., Trench, William F., Bencze, Mihaly, Watkins, William
Zdroj:	Mathematics Magazine, 1989 Feb 01. 62(1), 58-66.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2689948 Zobrazit plný text záznamu